PhpStorm = WebStorm + PHP + DB/SQL
All the features of WebStorm are included into PhpStorm, and full-fledged support for PHP and Databases/SQL support are added on top.
PhpStorm is renowned for its zero-configuration Visual Debugger, providing extraordinary insight into what goes on in your application at every step. It works with Xdebug and Zend Debugger, and can be used both locally and remotely. Unit Testing with PHPUnit, BDD with Behat and profiler integration are also available.